The N9 email client, by default, forces you to top-post your replies to emails (which is an awful practice).
When replying an email, it's imposible to properly reply (ie: bottom-posting, or inline replying), which made the app completely useless on a recent trip and forced me to use mutt to reply to my emails.

Is there any way to force the N9 mail app to bottom-post, or make the entire message editable?

I've also been looking around, and I'm curious; is the mail app open-source? Maybe it's a matter of tweaking something.